Mike “The Situation” Sorrentino is writing a self-help book. The “Jersey Shore” star landed a deal to pen “Here’s the Situation,” a guide to ripped abs, grooming, and how to keep up with your GTL (gym, tan, laundry). Sources said it will be published by Gotham Books this November in a deal brokered by Jarred Weisfeld of Objective Entertainment and Sorrentino’s manager, Michael Petolino. The Sitch is already cashing in with a workout video and health supplements.